F79

Unspecified intellectual disabilities

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

RxHCC V08

RXHCC148

Mild or Unspecified Intellectual Disability/Developmental Disorder

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · F79
Synonyms

Mental deficiency NOS Mental subnormality NOS

Inherited from F70-F79Intellectual Disabilities
Excludes 1

borderline intellectual functioning, IQ above 70 to 84 (R41.83)

Code first

any associated physical or developmental disorders

Inherited from chapter 5Mental, Behavioral and Neurodevelopmental disorders
Includes

disorders of psychological development

Excludes 2

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Official Guidelines for F79

FY 2026 ›

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